33290813 has 2 divisors, whose sum is σ = 33290814. Its totient is φ = 33290812.

The previous prime is 33290801. The next prime is 33290839. The reversal of 33290813 is 31809233.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29398084 + 3892729 = 5422^2 + 1973^2 .

It is a cyclic number.

It is not a de Polignac number, because 33290813 - 2⁴ = 33290797 is a prime.

It is a super-2 number, since 2×33290813² = 2216556460401938, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (33290843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16645406 + 16645407.

It is an arithmetic number, because the mean of its divisors is an integer number (16645407).

Almost surely, 2^33290813 is an apocalyptic number.

It is an amenable number.

33290813 is a deficient number, since it is larger than the sum of its proper divisors (1).

33290813 is an equidigital number, since it uses as much as digits as its factorization.

33290813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 33290813 is about 5769.8191479456. The cubic root of 33290813 is about 321.6928935396.

The spelling of 33290813 in words is "thirty-three million, two hundred ninety thousand, eight hundred thirteen".